Tanya Cockburn

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An attempt is made to explain along Darwinian lines the steps by which the treponematoses evolved and how they came to have their present distributions and characteristics. The original ancestors of the treponemes would have been free-living organisms, but various forms of symbiosis with larger creatures would in time lead to the development of parasitism(More)
Retroviral serologic profiles were generated for 506 random-source cats (Felis catus) that were received by our facility during a twenty-month period. Feline leukemia virus antigens were detected in plasma samples from 26 (5.1%) of the cats. Antibodies to feline immunodeficiency virus were present in 24 (4.7%) of the samples tested. A single cat (0.2%) was(More)